Test 3 - all sets Flashcards

(75 cards)

1
Q

What is the purpose of the camera lens

A

reflect light and refocus it into the camera sensor

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2
Q

power over ethernet is ______ volts DC

A

48 VDC

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3
Q

The purpose of a network is to

A

share data

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4
Q

what communication protocol is used by most computer networks

A

TCP/IP

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5
Q

what at the two memory types network cameras use to store images locally

A

built in or via memory card

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6
Q

NIC

A

network interface card

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7
Q

What is the most common type of BNC connector

A

compression

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8
Q

What makes a camera a “network Camera”?

A

it has an ethernet connection and a NIC

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9
Q

how is an IP address constructed

A

4 sets or numbers separated by decimal points

a network manager determines IP address

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10
Q

What is a SAN

A

a whole network set up solely to store data

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11
Q

what do you do if the existing network does not have sufficient bandwidth to support the addition of network video

A

install a parallel network

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12
Q

the term bandwidth is used to describe what

A

amount of information a network can transmit

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13
Q

what are the distance limitations for passive baluns

A

under 1000 feet

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14
Q

what is the most common voltage for full body cameras

A

24 VAC

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15
Q

What are advantages of using fiber optic cable

A

smaller and lighter
immune to lightning, RFI, EMI
can be in same cable tray as High voltage
no ground loop issues - electrically isolatedmost secure

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16
Q

What is the purpose of surge protection

A

Provide supplemental protection to CCTV equipment

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17
Q

what is the benefit for powering cameras via POE

A

one cable

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18
Q

EMI

A

electromagnetic interferance

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19
Q

what type of additional storage would you recommend to a customer that insists on a very large storage requirement with expansion capabilities in the future

A

SAN - Storage area network

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20
Q

What type of camera is more sensitive in low light condition

A

Black and white - more light is required to produce an accurate color image

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21
Q

the connection from a network device to a network jack is done using a _______

A

patch cable

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22
Q

how do day/night cameras work

A

switch to blk/white when less than favorable light conditions occur

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23
Q

what is the advantage of using a tinted dome

A

disguise the direction a camera is pointing

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24
Q

BLC

A

Back Light Compensation - dim light behind target increase light of target

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25
what is the transmission speed of 100 base T
100 MBPS
26
POE
power over ethernet
27
how are devices protected to prevent unauthorized access
a password and User ID
28
List some common sources of EMI
Florescent lights motors antennas cable
29
How do you eliminate lighting bloom
reposition camera or add more light in a different direction to even out lighting
30
what protocol is used for transferring data between computers on a network
TCP/IP
31
the five factors that determine the amount of recording time you will get out of your DVR/NVR are
``` Image record rate picture size image quality scene activity storage space ```
32
TCP/IP
transmission control protocol/internet protocol
33
what is the purpose of camera housing/domes
protect cameras from: tampering, the environment, and damage
34
How many splices are allowed in a run of coaxial video surveillance cabling what is industry standard
5 max | industry standard is two
35
RAID
redundant array of independent disks
36
How does a NVR receive its images
through a network connection | it can be a ethernet network or internet
37
List three alternate methods for video transmission
twisted (STP, UTP) fiber wireless
38
NVR
network video recorder
39
what affects can be expected if the network video equipment consumes too much of the available network bandwidth
slowing of network speed and crashes
40
What are two main methods for controlling PTZ cameras
digital and hardwire | keyboard and joystick
41
another name for network transmitter is a
video server
42
list the three common sixes and distance limitations for coax cable
RG-59: 500 FT RG-6: 750 FT RG-11: 1,500 FT
43
What is the process for viewing network video on a computer
type the IP address into a web browser
44
what are firewalls designed to do
protect a network
45
What connector is industry standard for cctv Coax
BNC - Bayonet Neill–Concelman
46
SAN (acronym meaning)
storage area network
47
how are dynamic and static ip addresses different
dynamic IP address are assigned at random unlike static IP addresses which cant be changed
48
why would you connect a RAID array to a HVR
to increase the amount of video storage
49
PTZ
Pan-Tilt-Zoom Camera
50
the RAID array connects directly to the ______ to increase the amount of video storage
NVR/HVR
51
periphereals
devices that are shared on a network eg printers fax machines
52
is all network based video equipment compatible
NO
53
node
fax machine, printers........
54
what are 5 common camera types
``` Full body cam Bullet Cam Dome Cam Board Cam Covert Cam ```
55
what is the unit of measure for light sensitivity
lux or foot candle
56
what is the purpose of the subnet mask
used to divide the network
57
How does network video differ from standard CCTV
standard video systems are hardwired to a image store/management system while network video systems connect to the network hub and can be viewed by multiple devices
58
what piece of equipment is the physical connection between the node and the network
NIC - Network interface card
59
who assigns the IP address to a device
network manager
60
what is the difference between a hub and a router
the hub is a switching/ control point where as the router allows a network to access the internet
61
how are inputs and outputs on a camera used
allow network transmitters to send signals to other locations over the network allow transmitter to receive control signals from remote locations can control auxiliary devices (EG motion detection, speakers)
62
how is internet IP address different from IP address
Internet IP address are generated by the service provider and always stay the same while dynamic IP address change
63
AGC
automatic gain control - increase image sensitivity in low light situations
64
why is it important to limit the amount of bandwidth you are using on the customers network
to prevent slowdowns and network crashes
65
what is a disadvantage of using a tinted dome
less light is let in
66
when selecting a transformer, be sure that it has sufficient ___________ to power all devices
wattage: current and voltage
67
what is the difference between general coverage and detail coverage
general covers a wide area while detail has a smaller coverage but more detail
68
what information is contained it the MAC address
hardware manufacture model number devices individual ID number
69
1 candle foot equals _____ lux
10 lux
70
What are 4 types of BNC connectors
twist on two piece crimp three piece crimp compression
71
what is the main difference between a standard DVR and a hybrid DVR
a DVR only has the ability to record a digital signal while a HDVR has the ability to record digital and analog signals
72
when is it safe to look down a fiber optic cable
when it is powered down or not connected to a lazer
73
list two type of firewall programs that mask the internal IP addressees of devices on a network when those devices are connected to the internet
DHCP - dynamic host configuration protocol | NAT - network address translation
74
ALC
automatic lens control - allows the camera to control auto iris lens
75
Can devices share an IP address
no, it would confuse the system